Add header providing timed asserts for unit tests

<level>_WITHIN asserts if the given condition becomes true
within the given timeout.

<level>_EDGE_WITHIN aserts if the given condition becomes
true no sooner than time 1 but not after time 2.

<level>_DONE_WITHIN asserts the execution time of the given
expression is under the given duration.

<level>_DONE_BETWEEN asserts the execution time of the given
expression is between the given durations.

Author: jschmidt-icinga

test/test-timedasserts.hpp

@@ -0,0 +1,134 @@
+/* Icinga 2 | (c) 2025 Icinga GmbH | GPLv2+ */
+
+#pragma once
+
+#include <BoostTestTargetConfig.h>
+#include <boost/test/test_tools.hpp>
+#include <chrono>
+#include <thread>
+
+#define ASSERT_CONDITION_WITHIN_TIMEOUT(condition, timeout, level)        \
+	/* NOLINTNEXTLINE */                                                  \
+	do {                                                                  \
+		/* NOLINTNEXTLINE */                                              \
+		auto pred = [&, this]() { return static_cast<bool>(condition); }; \
+		BOOST_##level(AssertWithTimeout(pred, timeout, #condition));      \
+	} while (0)
+
+#define REQUIRE_WITHIN(condition, timeout) ASSERT_CONDITION_WITHIN_TIMEOUT(condition, timeout, REQUIRE)
+#define CHECK_WITHIN(condition, timeout) ASSERT_CONDITION_WITHIN_TIMEOUT(condition, timeout, CHECK)
+#define WARN_WITHIN(condition, timeout) ASSERT_CONDITION_WITHIN_TIMEOUT(condition, timeout, WARN)
+
+#define ASSERT_CONDITION_EDGE_WITHIN_TIMEOUT(cond, time1, time2, level)    \
+	/* NOLINTNEXTLINE */                                                   \
+	do {                                                                   \
+		/* NOLINTNEXTLINE */                                               \
+		auto pred = [&, this]() { return static_cast<bool>(cond); };       \
+		BOOST_##level(AssertEdgeWithinTimeout(pred, time1, time2, #cond)); \
+	} while (0)
+
+#define REQUIRE_EDGE_WITHIN(cond, time1, time2) ASSERT_CONDITION_EDGE_WITHIN_TIMEOUT(cond, time1, time2, REQUIRE)
+#define CHECK_EDGE_WITHIN(cond, time1, time2) ASSERT_CONDITION_EDGE_WITHIN_TIMEOUT(cond, time1, time2, CHECK)
+#define WARN_EDGE_WITHIN(cond, time1, time2) ASSERT_CONDITION_EDGE_WITHIN_TIMEOUT(cond, time1, time2, WARN)
+
+#define ASSERT_DONE_WITHIN_TIMEOUT(expr, time1, time2, level)       \
+	/* NOLINTNEXTLINE */                                            \
+	do {                                                            \
+		/* NOLINTNEXTLINE */                                        \
+		auto task = [&, this]() { expr; };                          \
+		BOOST_##level(AssertDoneWithin(task, time1, time2, #expr)); \
+	} while (0)
+
+#define REQUIRE_DONE_BETWEEN(expr, time1, time2) ASSERT_DONE_WITHIN_TIMEOUT(expr, time1, time2, REQUIRE)
+#define CHECK_DONE_BETWEEN(expr, time1, time2) ASSERT_DONE_WITHIN_TIMEOUT(expr, time1, time2, CHECK)
+#define WARN_DONE_BETWEEN(expr, time1, time2) ASSERT_DONE_WITHIN_TIMEOUT(expr, time1, time2, WARN)
+
+#define REQUIRE_DONE_WITHIN(expr, time1) ASSERT_DONE_WITHIN_TIMEOUT(expr, 0s, time1, REQUIRE)
+#define CHECK_DONE_WITHIN(expr, time1) ASSERT_DONE_WITHIN_TIMEOUT(expr, 0s, time1, CHECK)
+#define WARN_DONE_WITHIN(expr, time1) ASSERT_DONE_WITHIN_TIMEOUT(expr, 0s, time1, WARN)
+
+namespace icinga {
+
+using namespace std::chrono_literals;
+
+/**
+ * Assert that the predicate `fn` will switch from false to true in the given time window
+ *
+ * @param fn The predicate to check
+ * @param timeout The duration in which the predicate is expected to return true
+ * @param cond A string representing the condition for use in error messages
+ *
+ * @return a boost assertion result.
+ */
+static boost::test_tools::assertion_result AssertWithTimeout(
+	const std::function<bool()>& fn,
+	const std::chrono::duration<double>& timeout,
+	std::string_view cond
+)
+{
+	std::size_t iterations = timeout / 1ms;
+	auto stepDur = timeout / iterations;
+	for (std::size_t i = 0; i < iterations && !fn(); i++) {
+		std::this_thread::sleep_for(stepDur);
+	}
+	boost::test_tools::assertion_result retVal{fn()};
+	retVal.message() << "Condition (" << cond << ") not true within " << timeout.count() << "s";
+	return retVal;
+}
+
+/**
+ * Assert that the predicate `fn` will switch from false to true in the given time window
+ *
+ * @param fn The predicate to check
+ * @param falseUntil The duration for which the predicate is expected to be false
+ * @param trueWithin The duration in which the predicate is expected to return true
+ * @param cond A string representing the condition for use in error messages
+ *
+ * @return a boost assertion result.
+ */
+static boost::test_tools::assertion_result AssertEdgeWithinTimeout(
+	const std::function<bool()>& fn,
+	const std::chrono::duration<double>& falseUntil,
+	const std::chrono::duration<double>& trueWithin,
+	std::string_view cond
+)
+{
+	std::size_t iterations = falseUntil / 1ms;
+	auto stepDur = falseUntil / iterations;
+	for (std::size_t i = 0; i < iterations && !fn(); i++) {
+		std::this_thread::sleep_for(stepDur);
+	}
+	if (fn()) {
+		boost::test_tools::assertion_result retVal{false};
+		retVal.message() << "Condition (" << cond << ") was true before " << falseUntil.count() << "s";
+		return retVal;
+	}
+	return AssertWithTimeout(fn, trueWithin, cond);
+}
+
+/**
+ * Assert that the given function takes a duration between lower and upper to complete.
+ *
+ * @param fn The function to execute
+ * @param lower the lower bound to compare the duration against
+ * @param upper the upper bound to compare the duration against
+ *
+ * @return a boost assertion result.
+ */
+template<class RepStart, class PeriodStart, class RepTimeout, class PeriodTimeout>
+static boost::test_tools::assertion_result AssertDoneWithin(
+	const std::function<void()>& fn,
+	const std::chrono::duration<RepStart, PeriodStart>& lower,
+	const std::chrono::duration<RepTimeout, PeriodTimeout>& upper,
+	std::string_view fnString
+)
+{
+	auto start = std::chrono::steady_clock::now();
+	fn();
+	auto duration = std::chrono::steady_clock::now() - start;
+	boost::test_tools::assertion_result retVal{duration > lower && duration < upper};
+	retVal.message() << fnString << " took " << std::chrono::duration<double>(duration).count() << "s";
+	return retVal;
+}
+
+} // namespace icinga